Originally Posted by
Psiko
I personally like the area around the Mirage Tower. I remember grinding levels fighting monsters in the desert around there as well as inside the first floor or two. But I've never played the newer editions, so there could be better locations that I don't know anything about...
Also, you should get NUKE, and make sure you have the Masamune sword along the way to Chaos. He is a tough battle, for sure, but far from being the worst in the Final Fantasy series. Good luck, and with some perserverence you'll pull it off eventually!
What is your party?